🐍 Tuples in Python

🔹 What is a Tuple in Python?

A tuple in Python is a built-in data structure used to store multiple values in a single variable. Tuples are ordered, immutable (unchangeable), and allow duplicate values.

👉 Tuples are commonly used when data should not be modified.

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✅ Why Use Tuples?

  • Store fixed or constant data
  • Faster and more memory-efficient than lists
  • Provide data security due to immutability
  • Can be used as dictionary keys

📌 Creating a Tuple

numbers = (1, 2, 3, 4)
names = ("Alice", "Bob", "Charlie")
mixed = (1, "Python", 3.5, True)

🔸 Single-Element Tuple

A comma is required to create a single-element tuple.

single = (10,)

📂 Types of Tuples in Python

1️⃣ Simple Tuple

Stores same type of elements.

marks = (80, 85, 90)

2️⃣ Mixed Tuple

Stores different data types.

data = (101, "Python", 9.8)

3️⃣ Nested Tuple

A tuple inside another tuple.

nested = ((1, 2), (3, 4))

4️⃣ Empty Tuple

empty = ()

📌 Accessing Tuple Elements

fruits = ("apple", "banana", "cherry")
print(fruits[0])   # apple
print(fruits[-1])  # cherry

📌 Tuple Slicing

Extracts a portion of a tuple.

numbers = (10, 20, 30, 40, 50)
print(numbers[1:4])  # (20, 30, 40)

⚠️ Immutability of Tuples

Tuples cannot be modified after creation.

# This will cause an error
fruits[1] = "mango"

📌 Tuple Operations

🔹 Concatenation

t1 = (1, 2)
t2 = (3, 4)
result = t1 + t2

🔹 Repetition

repeat = ("Python",) * 3

🔹 Membership

"apple" in fruits

📚 Tuple Methods

Method Description
count() Counts occurrences of an element
index() Returns index of an element
nums = (1, 2, 2, 3)
print(nums.count(2))
print(nums.index(3))

📌 Tuple Packing and Unpacking

🔹 Packing

data = 10, 20, 30

🔹 Unpacking

a, b, c = data

📌 Converting Tuple to List

Used when modification is required.

t = (1, 2, 3)
l = list(t)
l.append(4)
t = tuple(l)

✅ Advantages of Tuples

  • Faster than lists
  • Memory efficient
  • Immutable (data security)
  • Can be used as dictionary keys

❌ Disadvantages of Tuples

  • Cannot modify elements
  • Fewer built-in methods

📊 List vs Tuple (Quick Comparison)

Feature List Tuple
Mutability Mutable Immutable
Syntax [] ()
Speed Slower Faster
Methods More Fewer

🌍 Real-World Use Cases

  • Fixed data (coordinates, RGB values)
  • Database records
  • Function return values
  • Configuration settings
List in Python Dictionary in Python